Unformatted text preview: ENGR 111 C Fall 2009 Class 10.1 November 2, 2009 Threads, Threaded Fasteners, and Scaling Soccer Team Soccer Emily Peterson Emily Learning Objectives Learning Be able to understand threaded parts and their terminology Be able to draw threads symbols in Simplified or Schematic representations Be able to interpret and write thread notes in both Metric and English systems Thread Terminology Thread Thread Terminology Thread Thread Terminology Thread Thread Symbols Thread Common Head Types Common Head Types
6 FIN HEX HD BOLT 1.00-8UNC-2A-LH X 2.00 LG 3 REQ Square Head 5 REG SQ HD BOLT 0.50-13UNC-2A X 4.00 LG Course vs Fine Threads Note difference in Note threads per inch. threads Nut Types
Hex Head 2 REG HEX HD NUT 1.00-13UNC-2B Square Head 3 SQUARE NUT Head Types Head Hole Types with notes Hole Hole Types with notes Hole Simplified Threads Simplified Schematic Threads Schematic Detailed Threads Detailed English Thread Notes English English Thread Notes English English Thread Tables English Metric Thread Notes Metric Metric Thread Notes Metric Metric Thread Tables Metric Leader Command Leader AutoCAD can apply leaders with text directly Type Leader and enter. Start at the tip of the arrow and draw segments Start back to the text location back Press enter and type your text Colorado Colorado Two young boys were walking down a street in Bryan when a big Pit Bull Two jumped over a fence and attacked one of the boys. He had him by the neck and was about to kill him when the second boy pulled out his knife, jumped on the dog’s back and killed it. jumped The editor of the Battalion heard about it and thought it would be a great The story so he went to the boy’s house. After interviewing the boy and confirming the story, he said, “we will put this on the front page”. He started to write the headlines, “Heroic actions by young Aggie fan saves started Heroic friend’s life”. friend’s The boy said, “wait, I am not an Aggie fan, I like the Colorado Buffalos. The The editor said, O.K., we can still put this on the front page. He started to write the headlines again, write “Tragedy in Bryan as young hoodlum kills family pet”. Chamfers Chamfers Runout Runout Created when objects intersect a cylinder No stopping line is needed The RUNOUT line simply stops in the middle of nowhere Concept of Scaling Concept Sizing a model of a physical object so that the Sizing model fits in a given space. model The resulting model MUST be proportional to the The original object. original The ratio between the size of the model and the The actual object is called the SCALE of the model. actual Scaling Systems Scaling English Drawings Standard measurement unit is Standard the INCH the Dimensions expressed to Dimensions nearest hundredths or thousands of an inch thousands Format of scale:
Scale: 1 = XXunits Metric Drawings Standard measurement unit is Standard the mm Dimensions typically in Dimensions whole mm’s whole Format of scale: Scale: 1: XX One drawn inch equals XXunits Ratio of drawn size to actual size Reading a Scale Reading Scales are designed to make taking measurements Scales from a scaled drawing easier from If a drawing is done to a standard engineering scale, If the measurements can be obtained by measuring once and moving the decimal and Drawings to non-standard scales must be calculated Engineer and Metric Scale Engineer Engineer “inch” is Engineer “=” Say equals Metric Metric “millimeter” millimeter” is “:” is Say colon Engineers Scale Engineers The engineers scale takes the inch and divides The it into parts. it The number of divisions is listed to the left of The the scale. the Each ten divisions are numbered. Engineers Scale Engineers Basic unit is the INCH. (=) Basic INCH (=) Standard Ratios: Scale: 1 = XXunits 1 to 1 1 to 2 1 to 3 1 to 4 1 to 5 1 to 6 10 scale. 20 scale. 30 scale. 40 scale. 50 scale. 60 scale.
Scale: 1=2 Units may be included in Units scale factor. scale Using the Engineers Scale Using What is the length of the blue line shown What above if the scale is 1=30’? above 148 feet Using the Engineers Scale Using What is the length of the blue line shown What above if the scale is 1=4000’? above Using the Engineers Scale Using What is the length of the blue line shown What above if the scale is 1=4000’? above At 1=40’ it would be 93’, so At 1=4000’ it will be: 9300 feet Metric Scale Metric The metric scale took a standard metric tape measure The and reduced it by fixed ratios, which are listed to the left of the scale. left All measurements on a metric scale are normally All reported in mm. mm If you want other units you must shift the decimal If place. place. If you want scales other than those directly listed, you If must shift the decimal place. must Metric Scales Metric Basic unit is the mm (:) Basic Scale is a straight ratio of Scale drawn to actual size drawn Standard ratios: Scale: 1 : 20 Scale: 1 to 1 1 to 2 1 to 2.5 1 to 3 1 to 4 1 to 5 1:100 scale 1:200 scale 1:250 scale 1:300 scale 1:400 scale 1:500 scale Scale: 1:2 Using the Metric Scale Using What is the length of the red line shown above if What the scale is 1:250? Using the Metric Scale Using What is the length of the red line shown What above if the scale is 1:250? 23.5 m 2,350 cm 23,500 mm Using the Metric Scale Using What is the length of the red line shown What above if the scale is 1:2? Using the Metric Scale Using What is the length of the red line shown What above if the scale is 1:2? At 1:200 it is 11.1 m At 1:2 it is therefore .111 m, or 11.1 cm, or 111 mm Beat The Hell Beat Outta Colorado Homework (Due in one week) Homework Individual: Page 241 Page 283 Page284 ...
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